Severe wobble

A 2011 Seat Leon crashed into my parents 4 weeks ago after randomly losing control of the steering.

I would be concerned a garage not find the problem? does the car steer itself whilst holding the steering wheel straight or pull your arms all over the place?

I am no expert but I would work in from the wheels, brakes, suspension components (lower arms, shocks, bushes), ball joints, track rod ends, anti roll bar components, tracking, power steering, chassis maybe at the front and the rear.

The fact it seems to be after / during something making the car unstable should point to something affected by bumps suspension components?

I hit a curb about 25 years ago in my golf and after the tracking was out by so much the car was almost impossible to drive (clearly something else was bent by this) has the car been in a whack?

maybe try a different garage, perhaps even MOT the car, they may find the problem for £35?

Does it feel like it's coming from the front or back of the car i.e. does it shake the steering wheel or do you feel it through your seat?

Have you tried taking it to another garage for a second opinion?

Bill2016 said:

HELP PLEASE!

We have an Audi A3 Sportback which we have owned for seven years. It is high mileage (201,000) . The car has been perfect, it has never put a foot wrong until recently, the problem arises when you go over an uneven surface at speeds above 50/60mph. You have an uncontrollable violent speed wobble and the faster you are travelling the more violent it is. It has happened four times recently. We have taken it to the garage, changed the steering bushes, had the wheels balanced and aligned but it is still no better. It is positively dangerous as the wobble will take you from one side of the road to the other with no way of controlling it. Any advice or help would be much appreciated. Is it the springs, the anti-roll bars, the shock absorbers or what? We are at a loss and so is the garage. Many thanks.

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Does the car move to one side when you accelerate and when you release the accelerator, does it go back to the other side? If so, this happened to my car when one of the subframe bolts snapped, so the subframe was moving as I was driving along.

This might be a bit of a long-shot but you never know....
About 4 years ago I became aware that the suspension on my trusty A4 with intergalactic mileage felt really loose.
Each time I hit a pothole it felt as if the whole car leapt about a foot sideways!
All the joints and arms etc were OK so I fitted 4 new Boge shocks (kept existing springs) and the car was transformed, no jumping , just felt totally secure.
The car had passed an MOT with the old shocks about 6 months before but I'm very doubtful about how accurate a picture the test really gives of the shock absorber condition, none of mine were visibly weeping or anything like that.
Not saying that is your problem , but worn shocks can give really bad handling.